Smith had claimed he was simply defending himself during the break-in at his home in the small city of Little Falls on Thanksgiving Day 2012. Smith's attorney said the 65-year-old was fearful after previous burglaries.

But prosecutors argued that Smith waited in his basement and intended to kill the teens. A total of nine shots were fired at 17-year-old Nick Brady and 18-year-old Haile Kifer.

Jurors began deliberating Tuesday morning and within three hours had a verdict: Guilty on two counts each of first-degree and second-degree murder. Mothers of the teens cried as the verdicts were read, while Smith showed no emotion. Defense attorney Steve Meshbesher said he would appeal.